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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c89c3c5986c0ccc9fa8bbca3a9b8310fc27cb3183394bded5cf65d6676abc4f' 
  AND token = 'sPYyaHocFVNKmXR8TsPapG02kH5wRZsIvmgcuTIsGsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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