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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f11cee2994b1063d977ade1e302a298a092fb2277c935844f71b6e1c5adf8fce' 
  AND token = 'CfcaLcUWEMg8fA3e4e1U21MgCBrJGc00yciyZR/cagk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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