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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4299da2a2a4e90c10b950f02cd6b154560690b605aacd9c73ebaf92ae0bfeb5b' 
  AND token = '/K7W0c7RMfjfwvGalUThkoDCUKN5UfFKjXkRy5U4vgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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