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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee7a1457d7c7a1161d188c2e09bbce72b9715d5e6cd1c6957d3be49e9e3babea' 
  AND token = 'CC572ozukMuY7zS1mBNm8Eb7tzWlpyd3oHhcKdnwnVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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