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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a074602c8c30a3a4c483670f10be16fe58e7cd6ebb67eebe2927737966e0b31' 
  AND token = 'Jt9PCpdD1zy/l6GnXK9WQsIk++b/1q61a5MGvKkGScY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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