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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7197d6b233774b9c059cde3bd65cb4cc14f1701c4ea04e87f857fbb0308f9ab2' 
  AND token = 'v1LkDX6BTzkm15R8cX0XSX+nn64+WKQIrysNFsoC4Pw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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