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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7f9d31d90c0759e1d46e897612261aaded3c3244e88818c7a61a0daee96f9839' 
  AND token = 'JYu54ThV8wk8vt8yJkcv8hHq+yRfM+ukL1I0FtL5LxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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