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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb1707d964dc271bae79ed990bcfac32b8403ffb2a7ef83e14cb7f0df67d8582' 
  AND token = 'nUZW0JCR1HII1NAdBMUX5SLVNthOB83c29kdhIIkkjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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