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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1be4c419d1e02c5771fc983d7d456f635f5be565ae75159fd354e4ba7d0de639' 
  AND token = 'cAUfNsJ6vM2Bm4vUdgncAcPRqXu8EBGGk1rBff7ek5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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