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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '653278ac0ec5e601469177f16885d7410d4bdba6c0af2c2cfc7e74db7ffddf55' 
  AND token = 'YlvYgsdqyhUpbbqT4Tia66PSVfUi8K4UySV7Vpz1dRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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