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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '133b2e81ca86fe1930a6cad715c293beaf8f730e80ba5d2027df5d0b4ae8da9e' 
  AND token = '1d9WqkvzccO8A5JPMnJUqWIvMcAi46ULY5rLD2DEGmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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