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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2c54112c36bcb5edc9c6182162cc7ba07fee9b00393215a49554835e04fdd151' 
  AND token = 'MUa0zya/QdYcCOd6EfTrtFMCQQejyKaQQaL0dhpwkcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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