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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd0ba8e8b21f0d6e054b4e352e9a5c0d940c4f3f415f8243bca1e2a0ba3769d9' 
  AND token = 'IbiC57S2j22kNsp+9sg2PwMNPdqiqclZJfygOhkckm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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