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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ba5021c19024529c68b0a08b896568e7a2e622935f6cb72119ad70ac633d4e8' 
  AND token = 'zJ9i9lyC4dyulP9yBWqfn1BRZiBCv2nPOELD8s5Talg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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