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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bef4823b0122f18fd58ade3165dc5adb928faeec40fc5df6e9acea1f9bef2b65' 
  AND token = 'BOn5ojt5j1DqG303oWfH4sKT/5nlMs3SpnrpFkBAPKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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