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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e32db0714cb9354ba5b49b2058c4db352b7c4372607b3db47ba0822f32f10f9b' 
  AND token = '7v5Q42uylhUEn9tw52bLokrtT+3rR5sf0KlP1ioTJXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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