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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '816cacf04ab2da1d9f07439f869079a5676355a9d7c4eae12836e2ef907730b8' 
  AND token = 'E02t3ITTCcINNQGYlvPc/rYPz/W/NERpc12FXalwWio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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