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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80230cdaf2cb4730e9d238a4f9e24b508f3cb25751d17cbb74cb5ebe99a98857' 
  AND token = 'DhP3aCi40QBG9rnkzp9IATPeWLPPBufB6UU4lWZV+ME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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