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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '214681468cad103a011b6d061f98aa62fc05d2003884d64b2dbb0979e219969b' 
  AND token = 'iTAU77m2I/q9zEePbhJevKe2KbxlASbecNlpnL8yaho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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