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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd06705dc2e47a403285c6a72f92b9e185514688a0a0b6e8a4f8bfb9c828119ab' 
  AND token = '7NvDXV/jPR3R9lixNRucyUw2QAUuqWu4/dd6LOF7Hjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}