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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a010c560f74ce10798c17f5a60a6104583bf60ba21fd792d4acade053aa770e' 
  AND token = 'pSWpjIKnhQis1SSDUdMzw7Phf9+x+1+5Lkad9FebTc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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