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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae006d212f780d51a2ef6de792173f717aed2fd3a24274e37f1201e7837c4c4b' 
  AND token = 'ZRh6deRyqAFg9uk8teFtT66VaElHEei9Fq26HNmYO/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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