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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92f999ef450082985ab6512f84bfa3b08b081667b9ed7b8c25164155fdcdaef1' 
  AND token = 'tAwt2+v0R0Yyf6wiSg7e9Ye2tjruGnQAt0AZl5qHFWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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