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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69a014615d83b82ccbb80b09d736777f1a9b5cc1e750dd2eb2037ccad2b69de9' 
  AND token = '+5asf2iK4M+hfaTYK5TZSZ+yrMwtQjuYZFAfbQy9MQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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