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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd7d57df3e51bb31f7f24b794bc4bbd145d9e2557ea946d14d027d00c8528fed' 
  AND token = 'jEd4VSYSoWT3EapCf6NQDioOtc1P2WV0Tc7UjhG4+Hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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