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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce0fb8156df437b0f8272b5af575b4710ea9e7f21bf31b4c1decc6d5b704bf6f' 
  AND token = 'gwI0qaOC51xeo/PJyJLqxABQxF8hi8bNTTjvLb8KK48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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