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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2233aca30481a0801b3fa3311b601e091f1b5b2726f50a089037436f8c770a25' 
  AND token = 'lZ5YvOQlPpS8u2DEEAZFpqvP7S3p7M+giTKGPhvr0Dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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