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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ea241f6bac19c11d1dbe3d35152869d8a63d91bfa62d1e2cff3739f530b4e9b' 
  AND token = 'H4OQuX07o/4498fstTmhBqPpaUZ2gldr1uubORJb/HE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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