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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7c014910f26092f78712297a1cab5ac2fc3abda15cfd42e806364803d67caac5' 
  AND token = '0HvBbS8CeFd/yZBetm155GT8EqB1soMGZeVDIM/Z5L0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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