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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd523bd645854b4732af5bd44e12448bf06d3c54446ec39be2c4f505cd043ac11' 
  AND token = 'cKsAIIa1bY/qBMlS1a2bws37aw5ihR8nOn10cLPn5Fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00130

JSON explain

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