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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8130f8264d03a860c5c2d044fa45d3bde93e727b59d51b32e166a4a0d6fd800d' 
  AND token = 'BNeUnOSEZEOy72YXDh6AwI1KXWwgNpJA00IKe/B451U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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