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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7a7bf59f0c6e0dcfa8dd6b86973f4f4fbf1ffc3dbf789afb8e2554832ff5b05e' 
  AND token = 'uJ8J3kY0f5sZLPXJAiuaDLyN27HsQPNCBTLJ5/SXHCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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