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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b039aa1958caa310c24502c7e871d363b0de7d6f30e22e2cff9c21540ea34ddd' 
  AND token = 'WwX4JYGr3IngMd+J9gn6WxOTN4W5i4M4eJn8Pr3NINk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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