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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faa0a60129dc9a6da5b220c2c9522bd63152fdd8d5dba86b64e1a0deaea92129' 
  AND token = 'bmOB43eoNFUThMfGL7OcasNMWvGH6lU1Ss3m26P/TMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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