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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05f2accb9219a1053a75879bc287e24f248b9e102b12008f6ee99e7a30699dbc' 
  AND token = 'dqKO5Mdge7FSTIQX1dfh8bznjzq+3oZ0cnSRbw1XvkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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