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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '380ec4c892aa2ddb4a5ca0b4bbdd624555f0eef3368520c18aad83f64b8ad25f' 
  AND token = 'C3m2/SIlAWxNCIsC1UW6yZqEa5YlA4DiZrzolEE6OwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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