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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fc0bb3ad82c6cb370e7e26b7b73b6f4e7b6bab64f2479f6cbae82944f7642b6' 
  AND token = 'BHPtfcvAp8L3CU7u52YQQTc+yM8j+68AfC4bzRkI1f4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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