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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e5f06105f6de1096f2b8f5e3793bec9240fa2ff3cf9b645317b001577026865' 
  AND token = 'qgWL7pon2JTOz0YFQ4LC7VCk2ZNEeHPF5Tmf5oM1l0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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