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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f07d46c625843f9f048c5830144ea9546cc001cdce7b36586dc53de0b59a122b' 
  AND token = 'tJbDhOv4iiRW64YvWIf/ZczQR8N2YpWWJYXb8hPYvaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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