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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa18de4e9936450c54a8e8f1202820f1ba607899ea3cd3017a8bc1e6334f1e5a' 
  AND token = '2iDmm7/5yKNLfMV8ml+P8Px/QImA01+quQOyf+5scu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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