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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '44d0b0b9551993ecaaa60a72e0eb7d356faba1f1a54293ed4fa43d0b43dd2e9e' 
  AND token = '3fz+VXRATxr6HDH+K9PELvKBXda7tl+KPk45it+M2ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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