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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8724eac51fbccdec10e420c311a268e95d89d4c8919700586b3ea5568cd128a5' 
  AND token = 'xUc460MAqeRYe/C8gf1Lo1mcRtZ5BPN3WcVVXSnFwNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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