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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15224173f8d0cffc9b8c7fb37269bc8b9ca6e5df1f5b0f90f11d128d15966faf' 
  AND token = 'zk5F+WvdVEeckRGfX74/JULJP4yZsBiR80+Jr40XCsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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