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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9afcdccd8278c0630fd2eaa77183443befc6b364e715beb13ca561993b9641a2' 
  AND token = 'LT1Jay2U0BzCajRqsFSNWBUfcx2ya/Sa0OacL/CH86g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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