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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e2371153e0879f3fcbaeb1dff30e5aba3cb282fa2050b4cc54d8b1024129544d' 
  AND token = '8Hjzym7pYyCjEBX6CI60bpBSb9ravakQuZaiPG0LfjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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