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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1abdba95441e01789618064645a0ef2047c98dbd02e3251db7dc417e822dba56' 
  AND token = 'oyF0q2gDVc7WnM9MSsG3Qc7HAg+DX7Cy5rq1K0b2Gt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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