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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0c030d20a1bdc07a080820d58046c64172e7ca5db54b718b869ebb1312ef8887' 
  AND token = 'qjp8PMCahgw0E5gK/7u6Utp7OBlylTttgPuzAyZT46s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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